[Mne_analysis] Memory error reading raw files

[Eric Larson]

        External Email - Use Caution        

Or you can use memmapping by passing a filename string to `preload`, which
will be used for temporary storage.

Eric


On Sun, Dec 16, 2018, 11:37 Alexandre Gramfort <alexandre.gramfort at inria.fr
wrote:

>         External Email - Use Caution
>
> hi Karin,
>
> loading the file in memory will double the size as we do computations
> in double precision.
>
> I would see if you can use preload=False on read. The only thing that
> can be problematic
> is filtering which requires preload=True. In this case, I would
> process data by chunks. You can
> use the raw.crop method for this.
>
> HTH
> Alex
>
>
>
> On Sun, Dec 16, 2018 at 5:22 PM Karin Westin <karin.westin85 at gmail.com>
> wrote:
> >
> >         External Email - Use Caution
> >
> > Hi!
> > I'd like to preload raw-fif files (~40 min recording, sample rate 5000
> Hz, 10.2 GB) but it seems I'm running out of memory (RAM 16GB, 2x8 GB). Do
> I simply need more memory or is there any other way to tweak the loading of
> the raw files?
> >
> > Best,
> > Karin
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